1 files changed, 181 insertions, 0 deletions
diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DocumentRegion.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DocumentRegion.cs
new file mode 100644
index 0000000000..ff5863936b
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+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Editor/DocumentRegion.cs
@@ -0,0 +1,181 @@
+// 
+// DocumentRegion.cs
+//  
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+// 
+// Copyright (c) 2012 Xamarin Inc. (http://xamarin.com)
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using MonoDevelop.Core.Text;
+using Microsoft.CodeAnalysis;
+
+namespace MonoDevelop.Ide.Editor
+{
+	/// <summary>
+	/// An (Begin, End) pair representing a document span. It's a TextSegment working with lines &amp; columns instead of offsets.
+	/// </summary>
+	public struct DocumentRegion : IEquatable<DocumentRegion>
+	{
+		public static readonly DocumentRegion Empty = new DocumentRegion (0, 0, 0, 0);
+
+		/// <summary>
+		/// Gets a value indicating whether this DocumentRegion is empty.
+		/// </summary>
+		public bool IsEmpty {
+			get {
+				return beginLine < 1;
+			}
+		}
+
+		readonly int beginLine;
+		public int BeginLine {
+			get {
+				return beginLine;
+			}
+		}
+
+		readonly int beginColumn;
+		public int BeginColumn {
+			get {
+				return beginColumn;
+			}
+		}
+
+		readonly int endLine;
+		public int EndLine {
+			get {
+				return endLine;
+			}
+		}
+
+		readonly int endColumn;
+		public int EndColumn {
+			get {
+				return endColumn;
+			}
+		}
+
+		public DocumentLocation Begin {
+			get {
+				return new DocumentLocation (BeginLine, BeginColumn);
+			}
+		}
+		
+		public DocumentLocation End {
+			get {
+				return new DocumentLocation (EndLine, EndColumn);
+			}
+		}
+
+		public DocumentRegion (int beginLine, int beginColumn, int endLine, int endColumn)
+		{
+			this.beginLine = beginLine;
+			this.beginColumn = beginColumn;
+			this.endLine = endLine;
+			this.endColumn = endColumn;
+		}
+		
+		public DocumentRegion (DocumentLocation begin, DocumentLocation end)
+		{
+			beginLine = begin.Line;
+			beginColumn = begin.Column;
+			endLine = end.Line;
+			endColumn = end.Column;
+		}
+
+		public bool Contains (DocumentLocation location)
+		{
+			return Begin <= location && location < End;
+		}
+		
+		public bool Contains (int line, int column)
+		{
+			return Contains (new DocumentLocation (line, column));
+		}
+
+		public bool IsInside (DocumentLocation location)
+		{
+			return Begin <= location && location <= End;
+		}
+
+		public bool IsInside (int line, int column)
+		{
+			return IsInside (new DocumentLocation (line, column));
+		}
+
+		public override bool Equals (object obj)
+		{
+			return obj is DocumentRegion && Equals ((DocumentRegion)obj);
+		}
+
+		public override int GetHashCode ()
+		{
+			return unchecked (Begin.GetHashCode () ^ End.GetHashCode ());
+		}
+
+		public bool Equals (DocumentRegion other)
+		{
+			return Begin == other.Begin && End == other.End;
+		}
+
+		public static bool operator == (DocumentRegion left, DocumentRegion right)
+		{
+			return left.Equals(right);
+		}
+		
+		public static bool operator != (DocumentRegion left, DocumentRegion right)
+		{
+			return !left.Equals(right);
+		}
+
+		public TextSegment GetSegment (TextEditor document)
+		{
+			if (document == null)
+				throw new ArgumentNullException ("document");
+			var begin = document.LocationToOffset (Begin);
+			var end = document.LocationToOffset (End);
+			return new TextSegment (begin, end - begin);
+		}
+
+		public static implicit operator Microsoft.CodeAnalysis.Text.LinePositionSpan (DocumentRegion location)
+		{
+			return new Microsoft.CodeAnalysis.Text.LinePositionSpan (location.Begin, location.End);
+		}
+
+		public static implicit operator DocumentRegion(Microsoft.CodeAnalysis.Text.LinePositionSpan location)
+		{
+			return new DocumentRegion (location.Start, location.End);
+		}
+
+
+		public static implicit operator DocumentRegion(FileLinePositionSpan location)
+		{
+			return new DocumentRegion (location.StartLinePosition, location.EndLinePosition);
+		}
+
+
+		public override string ToString ()
+		{
+			return string.Format ("[DocumentRegion: Begin={0}, End={1}]", Begin, End);
+		}
+	}
+}
+